Spring draft attachment



(No Model.) 2 Sheets-Sheet 1.

H. BARBER. SPRING DRAFT ATTACHMENT.

No. 481,384. Patented Aug. 23, 1892.

5 @MHHIIIIIIIIIIIHIH I'EITIIIIIIIIIIIIHI 7 IV J1 (No Model.) 2Sheets-Sheet 2.

'H. BARBER.

' SPRING DRAFT ATTACHMENT.

' N 481,384. Patented Aug. 23, 1892.

UNITED STATES PATENT GFFICF}.

I-IIRAM BARBER, OF CHICAGO, ILLINOIS.

SPRING DRAFT ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 481,384, dated August23, 1892.

Application filed November 21, 1889. Serial No.33LO58. (No model.)

To all whom, it may concern.-

Be it known that I, I-IIRAM BARBER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Spring Draft Attachmentsfor Use on Plows, Cars, and other Implements, which are fully set forthin the following specification, reference being had to the accompanyingdrawings, in which Figure 1 is a plan view of the preferred form of myspring draft attachment as designed for use on plows. Fig. 2 is asectional view on line 2 2 of Fig. 1. Fig.3 is an under side plan viewof Fig. 7. Fig. 4 is a vertical cross-section on line 4 4 of Fig. 2.Fig. 5 is a plan View showing the preferred form of my spring draftattachment when attached to a plow. Fig. 6 is a perspective view of thedraw-bar B with swivel attached in the preferred form of my spring draftattachment as designed for plows. Fig. 7 is a perspective view of theslotted draw-plate P in the preferred form of my spring draft attachmentdesigned for use on plows.

In the construction of the preferable form of my spring draftattachment, more especially designed for use on plows, as hereindescribed, I make use of the slotted draw-plate P, the draw-bar B, therods R R, the coilsprings S S, the bolt T, the swivel V, attached to thedraw-bar B by means of the bolt q, and the hammer-strap h, hinged to thedraw-plate P by means of the lugs Z Z and pin 1', and the evener-bolt K.

The draw-plate P is provided on the inner side and at the rear endthereof with the two recesses 21. to, Fig. 3,in which the rear ends ofthe coil-springs S S are respectively held and work. These recesses areformed by the end plates 19 10 and the brackets 12 b b I), placed atright angles to the inner surface of the draw-plate P and at the pointof contact made integral therewith and with each other. The brackets b band b b are placed parallel with the longitudinal line of the plate P,while the end plates 19 p are placed at right angles thereto. The plates10 p are provided with the central apertures 0 0, through which the rearends of the rods R R are passed. The draw-plate P is also provided withthe central longitudinal slot I, in which the stem m of the bolt T hasmovement. The draw-plate P is also provided with the longitudinal recessZ on the outer surface thereof, formed by the ribs 1" r, in which recessthe flattened head M of the bolt T has movement beneath the undersurface of the evener E.

The draw-bar B is provided at the front end thereof with the cross-pieceX and at the rear end thereof with the cross-piece W. The centralsection of the cross-piece X is identical with the forward end of theshaft A, while the outer ends N N are flattened, with their faces ffffat right angles to the sides of the shaft A.

The ends N N of the cross-piece X are provided with the centralapertures a a for the passage of the forward ends of the rods R R, whilethe central section of the cross-piece Xis provided with the aperture afor the passage of the stemmof the bolt T. The rear end piece W of thedraw-bar B has its flattened faces f f f f also at right angles to thesides of the draw-shaft A. The ends N N are also provided with thecentral apertures a a for the passage of the rear ends of the rods R R,respectively. The cross-pieces X and WV of the draw-bar B are connectedby the shaft A and are made integral therewith.

The shaft A is provided with the slot or recess E for the insertion ofthe bolt q through the cross-piece W'.

The inner braces or brackets Z) l) on the inner surface of thedraw-plate P form the sides of the track or passage Y, in which the rearend of the shaft A of the draw-bar B is held and works. When, therefore,the several parts of the preferable form of my spring I draft attachmentdesigned for use on plows herein described are in position,the draw-barB is placed longitudinally against the inner surface of the draw-plateP, with the front faces ff of the cross-piece W in juxtaposition to therear faces of the plates 19 p and the rear end of the shaft A betweenthe brackets b I), while the forward end of the shaft A is held in placeby the stem m of the bolt T, which is inserted through the forward endof the slot I and also through the aperture 0, in the cross-piece X withthe head M resting in the recess Z, formed by the ribs 0" r on the outersurface of the plate P, and is held in place by the nut 2. Thecoil-springs S S are placed longitudinally between the rear faces of theends N N of the cross-piece X and the front faces of the plates 19 12upon the rods R R,respectively. The forward ends of the rods R Rpassing, respectively, through the apertures a a 1n the ends N N of thecross-piece X and the rear ends thereof through the apertures 0 0 1n theplates 10 p and the apertures a a in the ends N N of the cross-piece W,the same are held in place by the nuts '0 'l) o v. The evenerE ismounted on the outer surface of the draw-plate P by means of thehammer-strap h, hinged to the outer surface of the draw-plate P and thebolt K,the lower end of which bolt passes through the aperture 00' inthe forward end of the draw-plate P. When, therefore, the swivel V isattached to a plow and forward pressure is applied to the evener E, theplate P is drawn forward and the inner faces of the plates 19 p drivenagainst the rear ends of the coil-spring S S, respectively. At the samet methe front ends of the springs S S are held rigidly in position bythe ends N N of the cross-pieceX, respectively, and the springs S S arethus compressed to the extent of the resistance offered by the plow. Inthis manner is secured a yielding connection between the plow and thedraft-animal."

In the construction of spring draft attachments heretofore for use onplows two dlfi'lculties have been encountered-viz., first, the greatweight of the devices; second, the removal of the evener too far fromthe plow. In the devices here shown I have aimed to overcome both ofthese difficulties.

By cutting away all superfluous material or parts the weight of myspring draft attachment may be reduced to the desired extent withoutsacrificing its strength, while by mounting the evener upon the outersurface of the draw-plate and above the coil-springs the desired degreeof proximity to the plow may be readily obtained.

Having thus explained the object andpurpose of my spring draftattachment, its method of construction, and mode of operation,what Iclaim as my invention, and for which I desire to secure Letters Patent,is

1. In a spring draft attachment, the combi nation of the draw-plate P,the draw-bar B, the rods R R, the coil-springs S S, the swivel V,attached to the cross-piece W, the bolt T, and hammer-strap h, hinged tothe outer-surface of the plate P, all constructed and arrangedsubstantially as and for the purposes herein described.

2. In a spring draft attachment, the combination of the slotteddraw-plate P, the drawbar B, the rods R R, the coil-springs S S, theswivel V, attached to the cross-piece W, the bolt T, the hammer-strap h,hinged to the plate P, the evener E, and the bolt K, all arranged andconstructed substantially as and for the purposes herein described.

Witness my hand this 18th day of Novemher, A. D. 1889.

HIRAM BARBER. Witnesses:

TIMOTHY D. HURLEY, S. B. FOSTER.

